Don’t  forget to _______ the lights when you  leave the classroom.
A.turn onB.turn offC.turn upD.turn down
B
考查詞語辨析。
1. turn on意為“打開(電燈、自來水、無線電等)”。如: Please turn the electric fan on.請打開電風扇。
2. turn off意為“關閉(水源、煤氣、電燈等)”。如: Don’t forget to turn all the lights off before you come up to bed.你上樓睡覺之前,不要忘記把所有的燈都關上。
3. turn up是指將音量調(diào)大些。如: Turn the radio(a little)up so that the students at the back can also hear clearly.請將收音機音量(稍微)開大點,以便后排的學生也能聽清楚。
4. turn down意為“關小點(些)”,而不是完全關掉(turn off)。如: We usually turn down the heat before going to bed.睡覺前我們通常把暖氣調(diào)低一些。
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